5.4L MODULAR 3V PISTONS 3.552" 20.5CC 840LM

Sale price $400.00

Part Number: 840LM - Missing one Piston -  Special Price!!!

The L&M Difference - When Off the Shelf Won’t Make the Cut

Why settle for “Off the Shelf” products?

Here at L&M, we go above and beyond standard engine building design to offer specialized products that meet the highest performance requirements.


  • Ceramic coated tops for heat dissipation
  • Teflon coated and Reinforced skirts for friction reduction and strength
  • Hardened tool steel wrist pin for lifespan longevity
  • Built in, not cut out, valve pockets


  • Bore: 3.552"
  • Pin:  .866" x 2.500" with .200" Wall
  • CC's: -20.5cc,   9.5-1 Compression
  • Crown: .300" down minimum
  • Skirt: .130" Minimum